Filtering material.



K. KIEFER.

PILTERING MATERIAL.

APPLICATION FILED 00T.19, 1908.

Q t I rrn KARL KIEFER, OF CINCINNATI, OHIO.

rrn'rnnine MATERIAL.

Specification of Letters Patent.

Patented Jan. 1'3, 1911.

Application filed October 19, 1908. Serial No. 458,491. 1

To all whom it may concern:

Be it known that I, KARL KIEFER, a citizen of the United States, andresident of Cincinnati, in the county of Hamilton and State of Ohio,have invented a new and useful Improvement in Filtering Material, ofwhich the following is a specification.

My invention relates to an improvement in filtering material for thepurpose of the filtration of water and similar liquids.

The object of this invention is to produce a filtering material of greatcapacity and cheapness.

iThe invention is illustrated in its use in the accompanying drawings,of whi.ch-

Figure 1 is a top view upon the filter cas ing; Fig. 2 is a cross"section through the filter adapted for the use of my improved filteringmaterial.

The main casing A, Fig. 2, is provided with a cover B and a base casingC. It has a false bottom of'wire or other similar material D, withmeshes fine enough to retain the filtering material. This casing A iscone shaped. The inlet 3 in the cover serves for the admission of thewater and the outlet 4 in the base casing serves for the egress of theclear liquid. The cover is fastened in the known manner by bolts andnuts 5, and is hermetically tightened by means of the rubber gasket 6.The cover being heavy in the larger size, is suspended by swinging cranewith hand wheel E, the construction of which is easily seen from thedrawing.

My improved filtering material consists of a granular mineral materialin combination with a smaller amount of fibrous mineral material. Thegranular material consists of common river sand or powdered quartz, andthe fibrous mineral material is tering material may be washed from itsimpurities in a manner common to other sand filters.

What I claim as my invention and desire to secure by Letters Patentis 1. A filtering material consisting of approximately six parts sandand one part asbestos in a mechanical mixture.

2. A filtering material consisting in a mechanical mixture of a granularmineral material in combination with a fibrous mineral material.

3. A filtering material consisting in a mechanical mixture ofapproximately six parts granular mineral material and one part fibrousmineral material.

4. A filtering material consisting in a mechanical mixture of a granularmaterial in combination with a fibrous material.

5. A filtering material comprising a mixture of fibrous material with agranular substantially incompressible material of such grade that whenagitated together the components of the mixture will not readily sep-varate or segregate.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

KARL KIEFER.

Witnesses:

E. E. FINCH, G. JWERDEN.

